5-Bromo-6-azauracil CAS 4956-05-2
| CAS No. | 4956-05-2 |
| Molecular Formula | C3H2BrN3O2 |
| Molecular Weight | 191.97 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-Bromo-6-azauracil (CAS 4956-05-2), molecular formula C3H2BrN3O2 and molecular weight 191.97 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C3H2BrN3O2, 5-Bromo-6-azauracil contains an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 191.97 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
As a certified reference material (CRM), 5-Bromo-6-azauracil meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C3H2BrN3O2 |
| Molecular Weight | 191.97 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1958 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 3 |
Related Bromo Standards
- 3-Bromo-5-nitropyrazole (CAS 1208314-00-4)
- 5-Bromo-1,3-oxazole-4-carboxylic acid (CAS 1240611-09-9)
- 2-Bromo-4-nitroimidazole (CAS 65902-59-2)
- 2-Bromo-5-nitrofuran (CAS 823-73-4)
- 3-Bromo-4-nitropyrazole (CAS 784193-37-9)
- 4-bromo-1H-1,2,3-triazole-5-carboxylic acid (CAS 295345-31-2)
- 4-Bromo-3-isoxazolecarboxylic acid (CAS 893638-53-4)
- 4-Bromo-3-nitropyrazole (CAS 89717-64-6)
Recommended Standards
- 5-Bromo-1H-1,2,4-triazole-3-carboxylic acid (CAS 674287-63-9)
- Methyl 1-hydroxy-1,3-dihydrobenzo[c][1,2]oxaborole-7-carboxylate (CAS 1268335-29-0)
- 4-Bromooxazole-2-carboxylic Acid (CAS 944906-74-5)
- 2-(1-Hydroxy-1,3-dihydrobenzo[c][1,2]oxaborol-7-yl)acetic acid (CAS 1268335-32-5)
- 5-(1,3-Dioxolan-2-yl)-2-thienyl methyl ketone (CAS 773097-36-2)
- 3-Bromo-5H,6H,7H-cyclopenta[b]pyridine (CAS 158331-18-1)
- 3-Amino-6-[(3,4-dimethoxyphenyl)methyl]-4-(trifluoromethyl)thieno[2,3-b]pyridine-2-carboxamide (CAS 936080-63-6)
- 2,2-Dichloroacetophenone (CAS 2648-61-5)
- 5-Chloro-5H-dibenzo[a,d][7]annulene (CAS 18506-04-2)
- N-Me-N-bis(PEG2-propargyl) (CAS 1835759-84-6)
- 2-(6-Amino-8-mercapto-9H-purin-9-yl)acetic acid (CAS 1706445-15-9)
- 2-[3-[2-(2,6-dioxo-3-piperidyl)-1,3-dioxo-isoindolin-4-yl]propoxy]acetaldehyde (CAS 2416133-07-6)
- 4-N-Boc-amino-isonipecotic acid methyl ester oxalic acid salt (CAS 1263094-44-5)
- Semaglutide impurity 107 (CAS CATO-C4X-2226107)
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